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Forum topic by RetiredCoastie posted 11-22-2009 02:08 AM 1710 views 1 time favorited 11 replies Add to Favorites Watch
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RetiredCoastie

999 posts in 2649 days


11-22-2009 02:08 AM

I recently acquired a furnace blower and am in the process of building an air filter. I’ve looked through the previous posts for shop built filters but didn’t find the info I’m looking for.

My blower is powered by a motor that is 1/3HP, 5.4 amp, 115 volt, 4 speed (low, med low, med high, high)1100 rpm, the blower is rated at 850 CFM.

My questions are: What switch should I use and where did you folks get yours? I would like to use a rotary switch but a pull chain would be just as good. Will an automotive switch work? I could probably get by with a 3 speed switch once I figure which speeds work best in my shop. I also would like to incorporate a timer as well. I have tried finding one at Lowe’s and Home Depot but no luck due to the amp rating. Any help or suggestions would be appreciated. Thanks in advance!

-- www.thepatriotwoodworker.com Proud Supporter of Homes For Our Troops


11 replies so far

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MedicKen

1610 posts in 2929 days


#1 posted 11-22-2009 02:24 AM

Being that its a furnace blower you might try an HVAC supply house or a good electrial supply

-- My job is to give my kids things to discuss with their therapist....medic20447@gmail.com

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lew

11347 posts in 3222 days


#2 posted 11-22-2009 02:51 AM

I just wired mine for high speed. I have one in the basement window and a smaller one mounted between the ceiling/floor of the basement ceiling.

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

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lew

11347 posts in 3222 days


#3 posted 11-22-2009 02:53 AM

Just thought of something. They make SPDT toggle switches. That would give you 2 speeds.

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

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TopamaxSurvivor

17674 posts in 3142 days


#4 posted 11-22-2009 05:32 AM

Probably the most economical way would be to use a spring operated timer switch. They come in versions up to 24 hours. I’d just put it on high to move the max air through the filter

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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RetiredCoastie

999 posts in 2649 days


#5 posted 11-22-2009 06:57 PM

Thanks Topamax, that’s probably what I’ll do. My main objective is to remove as much dust from the air as possible. I hope that max fan speed won’t be too loud.

-- www.thepatriotwoodworker.com Proud Supporter of Homes For Our Troops

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willy3486

77 posts in 2864 days


#6 posted 11-22-2009 07:11 PM

I bought a fan out of a old furnace a few years ago at a yard sale. It was setup with one speed and to be used as a floor fan. The desire to have a air filter was bigger than a floor fan so I built one. It does make a noise but it is a plus. It makes enough noise to drown out the road noise by my house but not loud enough to get on my nerves. It is sort of relaxing as well. I use a wood stove to heat my shop and if it smokes up the place it can clean the air in just a minute or so. I don’t have a switch I just plug it in.

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hairy

2384 posts in 2999 days


#7 posted 11-22-2009 07:44 PM

I have made 2 so far. This one, it’s above the jointer, has 3 separate switches, one for each speed. It seemed like an easy way to do it,but it’s not effective. Without the filters installed, I can tell there are 3 distinct speeds, but cannot tell the difference with filters installed.I’m not sure what’s up with that.

http://lumberjocks.com/hairy/workshop

This one uses high speed only.

http://lumberjocks.com/projects/15760

The same motor is used in both. I gave a weak effort looking for a 3 speed switch, it would have been the way to go, but I am satisfied with the high speed all the time.I used standard household wall switches and boxes.

-- stay thirsty my friends...

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BlankMan

1488 posts in 2819 days


#8 posted 11-22-2009 07:55 PM

www.digikey.com

This page will let you search based on your parameters but do 1 parameter at a time if you get too specific it might not find anything.

http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=1114210&k=rotary%20switch

I found this one there:

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=360-2351-ND

It’s rated at 6A which is close but it’s only $8. There’s two others in that catagory but they’re non-stock items. These two are rated at 15A but they’re $29.

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=GH7283-ND
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=GH7287-ND

-- -Curt, Milwaukee, WI

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BlankMan

1488 posts in 2819 days


#9 posted 11-22-2009 08:04 PM

In thinking about this those switches I posted are 4 position so they probably don’t have a 5th postion for OFF so you may have to use a separate ON/OFF switch. I kind of view that as a plus because when you turn it on it’s at the speed you want. I searched for 5 and 6 position but there were none that could carry the current you need.

-- -Curt, Milwaukee, WI

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drfixit

318 posts in 2610 days


#10 posted 11-22-2009 08:09 PM

I have a couple that run off 220, and they do make noise, but you get used to it. I have one wired up just for bringing in fresh air from outside, its a 3 speed fan. But I only had a switch with off-low-high so i just taped off the medium speed and it works just fine as a 2 speed. You cant you most automotive switches because of the voltage rating. The switch may handle the amperage, but due to the voltage it may arc and short out or burn out the contacts.

-- I GIVE UP!!!! I've cut this @!&*!% board 3 times.... its still too short!

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RetiredCoastie

999 posts in 2649 days


#11 posted 11-23-2009 06:21 AM

Thanks for all of the input you folks have provided. I have a Buddie that’s in the spa business that I spoke with this evening and he has a switch that’s a 3 speed switch, with timer and remote control.

If that doesn’t work out then I will go with Topamax’s suggestion and use a one position 12 hr timer.

Thanks again guys!

-- www.thepatriotwoodworker.com Proud Supporter of Homes For Our Troops

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